<html xmlns:th="https://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>登录</title>
</head>
<body>
<h1>登录</h1>
<form th:action="@{/login}" method="post">
    <div>
        <!-- name必须为"username" -->
        <input type="text" name="username" placeholder="用户名" />
    </div>
    <div>
        <!-- name必须为"password" -->
        <input type="password" name="password" placeholder="密码" />
    </div>
    <input type="submit" value="登录" />
</form>
</body>
</html>